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NiCd batteries
NiCd batteries, also known as Nickel-cadmium or NiCad batteries, were the first reliable rechargeable batteries available to ordinary consumers.
While they have declined in popularity since the development of more environmentally friendly alternatives such as NiMh batteries, NiCd batteries are found in many important devices, such as:
- Medical equipment.
- Alarm systems.
- Emergency lighting.
- Portable power tools.
This is because they offer a reliable power source, and are durable enough to cope with the vibrations experienced by drill batteries.
NiCd batteries can also operate at extreme temperatures that would damage other types of battery. This is one of the reasons they are popular for medical and industrial applications.
Alternatives to NiCd batteries
As NiCd batteries contain chemicals that are potentially harmful, battery manufacturers have been developing more environmentally friendly alternatives.
Other types of battery include:
However, as long as NiCd batteries are handled correctly and recycled once they reach the end of their service life, any dangerous chemicals will have minimal environmental impact.
Proper use of NiCd batteries
Like all non-rechargeable and rechargeable batteries, NiCd batteries need to be handled properly if they are to work to their full capacity.
Some tips to remember include:
- Never reverse charge batteries, as this can damage them.
- Don't mix old and new batteries in the same device.
- Do not drop the battery, as this can cause an internal short circuit.
- Never burn NiCd batteries. They can explode and release potentially toxic gas.
When disposing of NiCd batteries - which may be marked as Ni Cad batteries - they must be recycled.
Sizes of NiCd batteries
Although they are declining in popularity, NiCd batteries are available from online retailers and other electrical goods stores, where you'll be able to find all sizes of NiCd batteries, including:
If used correctly, NiCd batteries can be charged up to 1000 times.
